Everyday Life: Tomato, Tomahhto?

My dinner plans to make spinach chicken were foiled tonight after I discovered the spinach that came in our organic fruit and veggie box today was really arugula in disguise.

Hubs says: So did you cook up the arugula instead?
Me: No way! Arugula is disgusting. It's not like spinach.
Hubs: Sure it is after you cook it.
Me: Do you know what arugula tastes like? It's bitter and yucky and terrible and disgusting.
Hubs: Not when you saute it like you would the spinach.
Me: Huh?
Hubs: Yeah, all you need to do is saute it just like you do the spinach.
Me: No way. Can't be.
Hubs: I swear.
Me: Well, I'm not trying it and then ruining perfectly good chicken.
Hubs: Sigh.

So who knows about arugula? Seriously? Is there a major difference between spinach and arugula when both have been sauteed. Come on, fancy pants cooks and gardeners; come out of the hiding and answer this. I would really like to know. No, I NEED to know.

Thank you for listening.